Samuel b



(No Model.)

S.v B. FRANK.

PULVERIZBR.

Patented Mar. 3, 18.91.

WIZ/VESSES M a m Z- UNITED STATES PATENT FFICE.

SAMUEL B. FRANK, OF NASHVILLE, TENNESSEE, ASSIGNOR OF ONE-HALF TOEDW'ARD B. POLK, OF SAME PLACE.

PU LVERIZER.

SPECIFICATION forming part of Letters Patent No. 447,674, dated March 3,1891.

Application filed June 11, 1890. Serial No. 355,096. (No model.)

To aZZ whom it may concern.-

Be it known that I, SAMUEL B. FRANK, a citizen of the United States,residing at Nashville, in the county of Davidson and State of Tennessee,have invented certain new and useful Improvements in Pulverizers; and Ido declare the following to be a full, clear, and exact description ofthe invention, such as will enable others skilled in the art to which itappertains to make and use the same, reference being had to theaccompanying drawings, and to the letters of reference marked thereon,which form a part of this specification.

This invention relates to pulverizers,and has for its object thepreparation of dirt or sand for brick-machines.

The invention consists in the novel arrangement and construction of thedifferent parts, as will be hereinafter fully described and claimed.

In the accompanying drawings, forming part of this application, Figure lis a side elevation of my pulverizer. Fig. 2 is a sectional viewthereof; and Fig. 3 is a front view of my semicircular arms carrying therollers.

Like letters of reference denote like parts throughout the figures.

On the inside of a cast iron frame A is located a cylinder B, journaledin either side of the frame A and provided with the usual drive-pulleyO. The frame A is provided with an ordinary hopper or opening a in thetop and suitable legs 0. A series of revolving scrapers D, having bladesd, are situated inside the frame A, the bottom scraper D being just atthe opening 02, from whence the pulverized dirt is deposited. The otherscrapers are situated at a given distance from the center of thecylinder B. These scrapers are all arranged in the front portion of theframe A, although there may be one or more such scrapers on the oppositeside or on the rearof the machine, as clearly shown in Fig. 2.

Between the cylinder 15 and the scrapers D is located a series of smallcylindrical rollers E. These rollers E are j ournaled at either end in asemicircular arm F, which is fulcrumed at its lower end in the sides ofthe frame A. The arms Fare connected by a bar f, extending across themachine and rig- ,idly attached to each of said arms. This bar f has ascrew-threaded aperture, into which is inserted a screw-threadedadjusting-screw G, having a broad foot 9 to prevent its becomingseparate from the bar f and a wheel-handle H.

A screw-threaded bearing h is formed in the frame A for theadjusting-screw, and by turning the handle of said screw in onedirection the bar f and the arms F, carrying the rollers E, will bemoved toward the cylinder B, and turning the handle of theadjustingscrew in the opposite direction the rollers E will be movedfrom the cylinder B.

It will be observed that one scraper D is arranged to scrape the smallrollers, while the scraper D is arranged to scrape the large cylindricalroller B and the lower small roller E, so that each small roller has itsouter surface thoroughly scraped. If it is desired to have the dirtmadeinto very fine particles,

the adjusting-screw is simply operated, which Will bring the top rollernear the cylinder B, the next roller will come a degree closer to thesaid cylinder, while the last or lower rolleris still closer to thecylinder, thus making the, space between the large cylindrical rollerand each of the small rollers less or smaller than the roller aboveit-that is, the pressure of the small rollers on the dirt or sand isregularly gradated by means of the arm F and bar f, actuated by theadjusting-screw G.

Power is imparted to the large cylinder or roller through the medium'ofa belt Ifrom an engine to the pulley O. The small rollers and scrapersare driven by suitable connectingbelts to the main pulley O.

I do not wish to be understood as limiting myself to any particularnumber of small rollers or to the number of scrapers shown, as I reserveto myself the right to use a less or greater number of each withoutdeparting from my invention.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-- 1. In a pulverizer,- the frame A, thecylindrical roller B, and the scraper D, in combination with the rollersE, adapted to be adjusted so as to form a graduated space betweenthemselves and the roller B, substantially as shown and described.

2. In a pulverizer, the combination of the large roller B, the scrapersD, located on either side of the said large roller, with the roller Ethe semicircular armfulcrurned in the sides of the frame A, the rollersE, journaled in said semicircular arm, the barf, having a screwthreadedaperture, and the adjusting-screw, IO substantially as shown an ddescribed, and for the purpose set forth.

In testimony whereof I atfix my signature in presence of two witnesses.

SAMUEL 1. FRANK. Witnesses:

WILLIAM A. WILLIAMS. SAMUEL M. FRANK.

